Lightning Blot Midi Transfer Stacks have everything you need for fast, efficient and reproducible electroblotting with most standard semi-dry blotters, including the Lightning Blotter from PerkinElmer. Each transfer stack consists of 3 vacuum sealed envelopes with pre-wet PVDF membrane, filter paper and transfer buffer. You can be ready to start the transfer in 2 minutes, and electroblotting is complete in 12 minutes or less. 0.2 micron membrane ensures complete transfer with minimal blow through for high and low molecular weight proteins.